corner
corner
APS » Journals » Phys. Rev. B » Volume 58 » Issue 8
< Previous Article | Next Article >

Phys. Rev. B 58, R4199–R4202 (1998)

Multiorbital Hubbard model in infinite dimensions: Quantum Monte Carlo calculation

Download: PDF (122 kB) Buy this article Export: BibTeX or EndNote (RIS)

J. E. Han
Max-Planck Institut für Festköperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany

M. Jarrell
Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221

D. L. Cox
Department of Physics, University of California, Davis, California 95616

Received 1 April 1998; published in the issue dated 15 August 1998

Using the quantum Monte Carlo technique we compute thermodynamics and spectra for the orbitally degenerate Hubbard model in infinite spatial dimensions. With increasing orbital degeneracy we find in the one-particle spectra broader Hubbard bands (consistent with increased kinetic energy), a narrowing Mott gap, and increasing quasiparticle spectral weight. Hund’s rule exchange coupling decreases the critical on-site Coulomb energy for the Mott transition. The metallic regime resistivity for twofold degeneracy is quadratic in temperature at low temperatures.

© 1998 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.58.R4199
DOI:
10.1103/PhysRevB.58.R4199
PACS:
75.30.Mb, 71.27.+a, 75.10.Dg
 
< Previous Article | Next Article >